Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: structures (user goal)
rejecting: structures-0.2 (global constraint requires ==0.1)
trying: structures-0.1
trying: semigroups-0.17.0.1 (dependency of structures-0.1)
trying: semigroups-0.17.0.1:+hashable
trying: semigroups-0.17.0.1:+unordered-containers
trying: semigroups-0.17.0.1:+text
trying: semigroups-0.17.0.1:+tagged
trying: tagged-0.8.1 (dependency of semigroups-0.17.0.1:+tagged)
trying: template-haskell-2.10.0.0/installed-90e... (dependency of
tagged-0.8.1)
next goal: pretty (dependency of template-haskell-2.10.0.0/installed-90e...)
rejecting: pretty-1.1.2.0/installed-293... (conflict: pretty =>
deepseq==1.4.1.1/installed-8fb..., structures => deepseq>=1.1 && <1.4)
rejecting: pretty-1.1.3.2, 1.1.3.1, 1.1.2.1, 1.1.2.0, 1.1.1.3, 1.1.1.2,
1.1.1.1, 1.1.1.0, 1.1.0.0, 1.0.1.2, 1.0.1.1, 1.0.1.0, 1.0.0.0 (conflict:
template-haskell => pretty==1.1.2.0/installed-293...)
Dependency tree exhaustively searched.